I'm trying to filter entities by wether a fields value is NULL/NOT NULL/BOTH in SonataAdminBundle. Is there a more concise way?

SonataAdmin Filter Entities by NULL Fields

<?php

// ...

class ProductAdmin extends SonataAdmin
{
    // ...
    
    protected function configureDatagridFilters(DatagridMapper $filter)
    {
        $filter->add('isImported', 'doctrine_orm_callback', array(
            'label' => 'Ist importiert',
            'callback' => function($queryBuilder, $alias, $field, $value) {
                if ($value['value'] == 'yes') {
                    $queryBuilder->andWhere($alias . '.remoteId IS NOT NUll');
                }
                if ($value['value'] == 'no') {
                    $queryBuilder->andWhere($alias . '.remoteId IS NUll');
                }
            }
        ), 'choice', array(
            'choices' => array(
                ''    => '',
                'yes' => 'Ja',
                'no'  => 'Nein'
            ),
        ));
    }
    
    // ...
}

You should also return true if a value is filtered. Otherwise the active filter will not be shown inside the filters:
sonata-project/SonataAdminBundle#2513 (comment)

Here is a full version using the SonataCoreBundle type constants and boolean translation domain:
https://gist.github.com/webdevilopers/c04abcff801c7837d25f